<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        .top-nav {
            width: 500px;
            height: 80px;
            box-shadow: 0 0 10px #ccc;
            margin: 0 auto;
            border-radius: 5px;
            overflow: hidden;
            border-bottom: 5px solid rgb(155, 189, 246);


        }

        .top-nav ul {
            list-style: none;
            display: flex;
            justify-content: space-evenly;
            align-items: center;
            line-height: 80px;
            padding: 0;
            margin: 0;

        }

        .top-nav ul li a {
            text-decoration: none;
            color: #000;
            font-size: 20px;
        }

        .top-nav ul li a {
            padding: 10px;
            border-radius: 10px;
        }

        .top-nav ul li a:hover {
            border: 3px solid rgb(155, 189, 246);
            color: rgb(155, 189, 246);
        }
    </style>
</head>

<body>
    <div class="top-nav">
        <ul>
            <li><a href="#">首页</a></li>
            <li><a href="#">热门项目</a></li>
            <li><a href="#">专家见解</a></li>
            <li><a href="#">联系我们</a></li>
        </ul>
    </div>
</body>

</html>